Spanish tortilla with spicy tomato sauce recipe

Ingredients

• 6 large eggs
• 400 g Maris Piper potatoes, parboiled and cubed
• 15 g unsalted butter
• 1 red onion, thinly sliced
• 1 courgette, thinly sliced
• 2 cloves garlic, crushed
• 1 pinch salt and pepper
• 1 bowl salad leaves to serve (optional)
• 1 can (400g) chopped tomatoes
• 1 red onion, finely diced
• 1/2 tsp smoked paprika
• 1/2 red chilli, deseeded and finely diced
• 1 tsp sugar
• 2 tbsp flat leaf parsley, chopped